Using finite element modelling to examine the flow process and temperature evolution in HPT under different constraining conditions

High-pressure torsion (HPT) is a metal-working technique used to impose severe plastic deformation into disc-shaped samples under high hydrostatic pressures. Different HPT facilities have been developed and they may be divided into three distinct categories depending upon the configuration of the an...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2014-08, Vol.63 (1), p.12041
Main Authors: Pereira, P H R, Figueiredo, R B, Cetlin, P R, Langdon, T G
Format: Article
Language:English
Subjects:
Configurations
Finite element method
Plastic deformation
Workpieces
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Summary:High-pressure torsion (HPT) is a metal-working technique used to impose severe plastic deformation into disc-shaped samples under high hydrostatic pressures. Different HPT facilities have been developed and they may be divided into three distinct categories depending upon the configuration of the anvils and the restriction imposed on the lateral flow of the samples. In the present paper, finite element simulations were performed to compare the flow process, temperature, strain and hydrostatic stress distributions under unconstrained, quasi-constrained and constrained conditions. It is shown there are distinct strain distributions in the samples depending on the facility configurations and a similar trend in the temperature rise of the HPT workpieces.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/63/1/012041